[v5.15] Internal error in do_notify_resume

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: c79648372d02 Linux 5.15.189
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10c53ea2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9e47345638b85bd0
dashboard link: https://syzkaller.appspot.com/bug?extid=179ca0e711901cdd6e67
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7ab49562317a/disk-c7964837.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e847ec1e38d3/vmlinux-c7964837.xz
kernel image: https://storage.googleapis.com/syzbot-assets/263158c6371c/Image-c7964837.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+179ca0...@syzkaller.appspotmail.com

Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4302 Comm: syz.4.250 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : setup_rt_frame arch/arm64/kernel/signal.c:-1 [inline]
pc : handle_signal arch/arm64/kernel/signal.c:833 [inline]
pc : do_signal arch/arm64/kernel/signal.c:908 [inline]
pc : do_notify_resume+0x958/0x3128 arch/arm64/kernel/signal.c:946
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : setup_rt_frame arch/arm64/kernel/signal.c:788 [inline]
lr : handle_signal arch/arm64/kernel/signal.c:833 [inline]
lr : do_signal arch/arm64/kernel/signal.c:908 [inline]
lr : do_notify_resume+0x938/0x3128 arch/arm64/kernel/signal.c:946
sp : ffff80001f547be0
x29: ffff80001f547e00 x28: 00000000fffffff2 x27: ffff80001f547eb0
x26: 0000000000000001 x25: 000000001fffee20 x24: ffff80001f547f98
x23: 0000000000000001 x22: dfff800000000000 x21: ffff0000d71c0000
x20: 0000000000000000 x19: 0000001fffee2000 x18: 0000000000000200
x17: 0000000000000000 x16: ffff800008041968 x15: 0000000000000002
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000ffffffffffff x9 : 000000001fffee20
x8 : 0000000000000000 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
setup_rt_frame arch/arm64/kernel/signal.c:788 [inline]
handle_signal arch/arm64/kernel/signal.c:833 [inline]
do_signal arch/arm64/kernel/signal.c:908 [inline]
do_notify_resume+0x958/0x3128 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
el0_da+0x10c/0x1fc arch/arm64/kernel/entry-common.c:495
el0t_64_sync_handler+0xd8/0xe4 arch/arm64/kernel/entry-common.c:629
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 9a9f0329 d503229f f9405fe8 f8000928 (14000003)
---[ end trace 44bbf79232587a1e ]---
----------------
Code disassembly (best guess):
0: 9a9f0329 csel x9, x25, xzr, eq // eq = none
4: d503229f csdb
8: f9405fe8 ldr x8, [sp, #184]
c: f8000928 sttr x8, [x9]
* 10: 14000003 b 0x1c <-- trapping instruction


---
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If you want to undo deduplication, reply with:
#syz undup

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: c79648372d02 Linux 5.15.189
git tree: linux-5.15.y

console output: https://syzkaller.appspot.com/x/log.txt?x=1739e842580000

kernel config: https://syzkaller.appspot.com/x/.config?x=9e47345638b85bd0
dashboard link: https://syzkaller.appspot.com/bug?extid=179ca0e711901cdd6e67
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
userspace arch: arm64

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1142cda2580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7ab49562317a/disk-c7964837.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e847ec1e38d3/vmlinux-c7964837.xz
kernel image: https://storage.googleapis.com/syzbot-assets/263158c6371c/Image-c7964837.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+179ca0...@syzkaller.appspotmail.com

Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:

CPU: 0 PID: 4246 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : setup_rt_frame arch/arm64/kernel/signal.c:-1 [inline]
pc : handle_signal arch/arm64/kernel/signal.c:833 [inline]
pc : do_signal arch/arm64/kernel/signal.c:908 [inline]
pc : do_notify_resume+0x958/0x3128 arch/arm64/kernel/signal.c:946
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : setup_rt_frame arch/arm64/kernel/signal.c:788 [inline]
lr : handle_signal arch/arm64/kernel/signal.c:833 [inline]
lr : do_signal arch/arm64/kernel/signal.c:908 [inline]
lr : do_notify_resume+0x938/0x3128 arch/arm64/kernel/signal.c:946

sp : ffff80001fdb7be0
x29: ffff80001fdb7e00 x28: 00000000fffffff2 x27: ffff80001fdb7eb0
x26: 0000000000000001 x25: 0000ffffd2820ff0 x24: ffff80001fdb7f98
x23: 0000000000000001 x22: dfff800000000000 x21: ffff0000d8c5d1c0
x20: 0000000000000000 x19: 00ffffd2820ff000 x18: 0000000000000200

x17: 0000000000000000 x16: ffff800008041968 x15: 0000000000000002
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100

x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000ffffd2820ff0

x8 : 0000000000000000 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
setup_rt_frame arch/arm64/kernel/signal.c:788 [inline]
handle_signal arch/arm64/kernel/signal.c:833 [inline]
do_signal arch/arm64/kernel/signal.c:908 [inline]
do_notify_resume+0x958/0x3128 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]

el0_ia+0x158/0x2d0 arch/arm64/kernel/entry-common.c:513
el0t_64_sync_handler+0xc0/0xe4 arch/arm64/kernel/entry-common.c:632

el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 9a9f0329 d503229f f9405fe8 f8000928 (14000003)

---[ end trace 6b8aea85849f5b99 ]---

----------------
Code disassembly (best guess):
0: 9a9f0329 csel x9, x25, xzr, eq // eq = none
4: d503229f csdb
8: f9405fe8 ldr x8, [sp, #184]
c: f8000928 sttr x8, [x9]
* 10: 14000003 b 0x1c <-- trapping instruction


---

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: c79648372d02 Linux 5.15.189
git tree: linux-5.15.y

console output: https://syzkaller.appspot.com/x/log.txt?x=106acda2580000

kernel config: https://syzkaller.appspot.com/x/.config?x=9e47345638b85bd0
dashboard link: https://syzkaller.appspot.com/bug?extid=179ca0e711901cdd6e67
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
userspace arch: arm64

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=167cf5a2580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1648aaf0580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7ab49562317a/disk-c7964837.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e847ec1e38d3/vmlinux-c7964837.xz
kernel image: https://storage.googleapis.com/syzbot-assets/263158c6371c/Image-c7964837.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+179ca0...@syzkaller.appspotmail.com

Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:

CPU: 0 PID: 4214 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : setup_rt_frame arch/arm64/kernel/signal.c:-1 [inline]
pc : handle_signal arch/arm64/kernel/signal.c:833 [inline]
pc : do_signal arch/arm64/kernel/signal.c:908 [inline]
pc : do_notify_resume+0x958/0x3128 arch/arm64/kernel/signal.c:946
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : setup_rt_frame arch/arm64/kernel/signal.c:788 [inline]
lr : handle_signal arch/arm64/kernel/signal.c:833 [inline]
lr : do_signal arch/arm64/kernel/signal.c:908 [inline]
lr : do_notify_resume+0x938/0x3128 arch/arm64/kernel/signal.c:946

sp : ffff80001fcf7be0
x29: ffff80001fcf7e00 x28: 00000000fffffff2 x27: ffff80001fcf7eb0
x26: 0000000000000001 x25: 0000fffff1972290 x24: ffff80001fcf7f98
x23: 0000000000000001 x22: dfff800000000000 x21: ffff0000d6b99b40
x20: 0000000000000000 x19: 00fffff197229000 x18: 0000000000000200

x17: 0000000000000000 x16: ffff800008041968 x15: 0000000000000002
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100

x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000fffff1972290

x8 : 0000000000000000 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
setup_rt_frame arch/arm64/kernel/signal.c:788 [inline]
handle_signal arch/arm64/kernel/signal.c:833 [inline]
do_signal arch/arm64/kernel/signal.c:908 [inline]
do_notify_resume+0x958/0x3128 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]

el0_ia+0x158/0x2d0 arch/arm64/kernel/entry-common.c:513
el0t_64_sync_handler+0xc0/0xe4 arch/arm64/kernel/entry-common.c:632

el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 9a9f0329 d503229f f9405fe8 f8000928 (14000003)

---[ end trace c9ce8571e64d5d8c ]---

----------------
Code disassembly (best guess):
0: 9a9f0329 csel x9, x25, xzr, eq // eq = none
4: d503229f csdb
8: f9405fe8 ldr x8, [sp, #184]
c: f8000928 sttr x8, [x9]
* 10: 14000003 b 0x1c <-- trapping instruction


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