[moderation] [mm?] KCSAN: data-race in __delete_from_swap_cache / folio_mapping (5)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 36c254515dc6 Merge tag 'powerpc-6.12-4' of git://git.kerne..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17951440580000
kernel config: https://syzkaller.appspot.com/x/.config?x=a2f7ae2f221e9eae
dashboard link: https://syzkaller.appspot.com/bug?extid=391379784937fd5bf87e
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [ak...@linux-foundation.org linux-...@vger.kernel.org linu...@kvack.org]

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6637126dc14c/disk-36c25451.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7ed8be8b7151/vmlinux-36c25451.xz
kernel image: https://storage.googleapis.com/syzbot-assets/889c1c324bbe/bzImage-36c25451.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+391379...@syzkaller.appspotmail.com

==================================================================
BUG: KCSAN: data-race in __delete_from_swap_cache / folio_mapping

write to 0xffffea0004a875a8 of 8 bytes by task 7037 on cpu 0:
__delete_from_swap_cache+0x1f0/0x290 mm/swap_state.c:163
delete_from_swap_cache+0x72/0xe0 mm/swap_state.c:243
shmem_swapin_folio+0xb0a/0xbe0 mm/shmem.c:2204
shmem_get_folio_gfp+0x26e/0xd90 mm/shmem.c:2268
shmem_fault+0xfa/0x250 mm/shmem.c:2536
__do_fault+0xb6/0x200 mm/memory.c:4876
do_read_fault mm/memory.c:5282 [inline]
do_fault mm/memory.c:5416 [inline]
do_pte_missing mm/memory.c:3965 [inline]
handle_pte_fault mm/memory.c:5751 [inline]
__handle_mm_fault mm/memory.c:5894 [inline]
handle_mm_fault+0xe7f/0x2a80 mm/memory.c:6062
do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x3b9/0x650 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

read to 0xffffea0004a875a8 of 8 bytes by task 7033 on cpu 1:
folio_mapping+0xdb/0x120 mm/util.c:853
folio_evictable mm/internal.h:389 [inline]
evict_folios+0x2377/0x3140 mm/vmscan.c:4590
try_to_shrink_lruvec+0x5d2/0x700 mm/vmscan.c:4778
lru_gen_shrink_lruvec mm/vmscan.c:4920 [inline]
shrink_lruvec+0x22d/0x1840 mm/vmscan.c:5675
shrink_node_memcgs mm/vmscan.c:5911 [inline]
shrink_node+0x615/0x1d40 mm/vmscan.c:5951
shrink_zones mm/vmscan.c:6195 [inline]
do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6257
try_to_free_mem_cgroup_pages+0x1e3/0x490 mm/vmscan.c:6589
try_charge_memcg+0x2bc/0x810 mm/memcontrol.c:2207
obj_cgroup_charge_pages+0xbd/0x1a0 mm/memcontrol.c:2623
__memcg_kmem_charge_page+0x9d/0x170 mm/memcontrol.c:2650
__alloc_pages_noprof+0x1bc/0x340 mm/page_alloc.c:4750
alloc_pages_mpol_noprof+0xb1/0x1e0 mm/mempolicy.c:2265
alloc_pages_noprof+0xe1/0x100 mm/mempolicy.c:2345
vm_area_alloc_pages mm/vmalloc.c:3568 [inline]
__vmalloc_area_node mm/vmalloc.c:3646 [inline]
__vmalloc_node_range_noprof+0x72e/0xec0 mm/vmalloc.c:3828
__kvmalloc_node_noprof+0x121/0x170 mm/util.c:680
ip_set_alloc+0x1f/0x30 net/netfilter/ipset/ip_set_core.c:256
hash_netiface_create+0x273/0x730 net/netfilter/ipset/ip_set_hash_gen.h:1568
ip_set_create+0x359/0x8a0 net/netfilter/ipset/ip_set_core.c:1104
nfnetlink_rcv_msg+0x4a9/0x570 net/netfilter/nfnetlink.c:302
netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2551
nfnetlink_rcv+0x16c/0x15c0 net/netfilter/nfnetlink.c:667
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x140/0x180 net/socket.c:744
____sys_sendmsg+0x312/0x410 net/socket.c:2607
___sys_sendmsg net/socket.c:2661 [inline]
__sys_sendmsg+0x1d9/0x270 net/socket.c:2690
__do_sys_sendmsg net/socket.c:2699 [inline]
__se_sys_sendmsg net/socket.c:2697 [inline]
__x64_sys_sendmsg+0x46/0x50 net/socket.c:2697
x64_sys_call+0x2689/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x000000000000025c -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 7033 Comm: syz.2.1173 Not tainted 6.12.0-rc2-syzkaller-00307-g36c254515dc6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
==================================================================


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.