ci2 starts bisection 2024-03-07 01:33:48.418024213 +0000 UTC m=+127969.495811744
bisecting fixing commit since cd94fe67fd3323953016b8193f5be75982da96c8
building syzkaller on 6654cf89a7909afd314ad8abd502bc0dd024112a
ensuring issue is reproducible on original commit cd94fe67fd3323953016b8193f5be75982da96c8
testing commit cd94fe67fd3323953016b8193f5be75982da96c8 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b0456dc419f02025d89a2fe3ecf3ced6cc2a89dcecfbc3604ef3aafa7de87a40
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: KASAN: use-after-free Read in ext4_find_extent
run #2: crashed: KASAN: use-after-free Read in ext4_find_extent
run #3: crashed: KASAN: use-after-free Read in ext4_find_extent
run #4: crashed: kernel BUG in ext4_writepages
run #5: crashed: KASAN: use-after-free Read in ext4_find_extent
run #6: crashed: KASAN: use-after-free Read in ext4_find_extent
run #7: crashed: kernel BUG in ext4_writepages
run #8: crashed: KASAN: use-after-free Read in ext4_find_extent
run #9: crashed: KASAN: use-after-free Read in ext4_find_extent
run #10: crashed: KASAN: use-after-free Read in ext4_find_extent
run #11: crashed: KASAN: use-after-free Read in ext4_find_extent
run #12: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent
run #13: crashed: KASAN: use-after-free Read in ext4_find_extent
run #14: crashed: KASAN: use-after-free Read in ext4_find_extent
run #15: crashed: KASAN: use-after-free Read in ext4_find_extent
run #16: crashed: KASAN: use-after-free Read in ext4_find_extent
run #17: crashed: KASAN: use-after-free Read in ext4_find_extent
run #18: crashed: KASAN: use-after-free Read in ext4_find_extent
run #19: crashed: KASAN: use-after-free Read in ext4_find_extent
representative crash: KASAN: use-after-free Read in ext4_find_extent, types: [KASAN]
check whether we can drop unnecessary instrumentation
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed
testing commit cd94fe67fd3323953016b8193f5be75982da96c8 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 87aba066f9553f1407d4d0541b1189f0fc916b996cc9a10326b93457eb94f10f
run #0: crashed: KASAN: use-after-free Read in ext4_find_extent
run #1: crashed: KASAN: use-after-free Read in ext4_find_extent
run #2: crashed: KASAN: use-after-free Read in ext4_find_extent
run #3: crashed: KASAN: use-after-free Read in ext4_find_extent
run #4: crashed: KASAN: use-after-free Read in ext4_find_extent
run #5: crashed: KASAN: use-after-free Read in ext4_find_extent
run #6: crashed: invalid opcode in ext4_writepages
run #7: crashed: KASAN: use-after-free Read in ext4_find_extent
run #8: crashed: invalid opcode in ext4_writepages
run #9: crashed: KASAN: use-after-free Read in ext4_find_extent
representative crash: KASAN: use-after-free Read in ext4_find_extent, types: [KASAN]
the bug reproduces without the instrumentation
disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed
kconfig minimization: base=5179 full=6487 leaves diff=250
split chunks (needed=false): <250>
split chunk #0 of len 250 into 5 parts
testing without sub-chunk 1/5
disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing commit cd94fe67fd3323953016b8193f5be75982da96c8 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 29a96f320062d60f3463911c1b3db06347b4d68795322ff9141a60c878eda009
run #0: crashed: invalid opcode in ext4_split_extent_at
run #1: crashed: invalid opcode in ext4_writepages
run #2: crashed: KASAN: use-after-free Read in ext4_find_extent
run #3: crashed: KASAN: use-after-free Read in ext4_find_extent
run #4: crashed: KASAN: use-after-free Read in ext4_find_extent
run #5: crashed: KASAN: use-after-free Read in ext4_find_extent
run #6: crashed: KASAN: use-after-free Read in ext4_find_extent
run #7: crashed: KASAN: use-after-free Read in ext4_find_extent
run #8: crashed: invalid opcode in ext4_writepages
run #9: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent
representative crash: KASAN: use-after-free Read in ext4_find_extent, types: [KASAN UNKNOWN]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit cd94fe67fd3323953016b8193f5be75982da96c8 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b931c26812881d1476bda13b743ddb2badf9cbc49abf7ab840a84a07681041c7
run #0: crashed: KASAN: use-after-free Read in ext4_find_extent
run #1: crashed: KASAN: use-after-free Read in ext4_find_extent
run #2: crashed: invalid opcode in ext4_writepages
run #3: crashed: KASAN: use-after-free Read in ext4_find_extent
run #4: crashed: KASAN: use-after-free Read in ext4_find_extent
run #5: crashed: KASAN: use-after-free Read in ext4_find_extent
run #6: crashed: KASAN: use-after-free Read in ext4_find_extent
run #7: crashed: KASAN: use-after-free Read in ext4_find_extent
run #8: crashed: KASAN: use-after-free Read in ext4_find_extent
run #9: crashed: KASAN: use-after-free Read in ext4_find_extent
representative crash: KASAN: use-after-free Read in ext4_find_extent, types: [KASAN]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
testing commit cd94fe67fd3323953016b8193f5be75982da96c8 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 44a6893db8aa9eacb28740905e79592bf2cafb073978b1504fb49057a99f6df4
run #0: crashed: KASAN: use-after-free Read in ext4_find_extent
run #1: crashed: KASAN: use-after-free Read in ext4_find_extent
run #2: crashed: KASAN: use-after-free Read in ext4_find_extent
run #3: crashed: KASAN: use-after-free Read in ext4_find_extent
run #4: crashed: KASAN: use-after-free Read in ext4_find_extent
run #5: crashed: invalid opcode in ext4_writepages
run #6: crashed: invalid opcode in ext4_writepages
run #7: crashed: KASAN: use-after-free Read in ext4_find_extent
run #8: crashed: KASAN: use-after-free Read in ext4_find_extent
run #9: crashed: KASAN: use-after-free Read in ext4_find_extent
representative crash: KASAN: use-after-free Read in ext4_find_extent, types: [KASAN]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit cd94fe67fd3323953016b8193f5be75982da96c8 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: e0d6c26c481678a4768973e35daf3e052ca3ad8fe4d6fc6ce4fc339f94ab1f6c
run #0: crashed: KASAN: use-after-free Read in ext4_find_extent
run #1: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent
run #2: crashed: KASAN: use-after-free Read in ext4_find_extent
run #3: crashed: KASAN: use-after-free Read in ext4_find_extent
run #4: crashed: KASAN: use-after-free Read in ext4_find_extent
run #5: crashed: KASAN: use-after-free Read in ext4_find_extent
run #6: crashed: KASAN: use-after-free Read in ext4_find_extent
run #7: crashed: KASAN: use-after-free Read in ext4_find_extent
run #8: crashed: KASAN: use-after-free Read in ext4_find_extent
run #9: crashed: KASAN: use-after-free Read in ext4_find_extent
representative crash: KASAN: use-after-free Read in ext4_find_extent, types: [KASAN]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed
testing commit cd94fe67fd3323953016b8193f5be75982da96c8 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
failed building cd94fe67fd3323953016b8193f5be75982da96c8: net/socket.c:1225: undefined reference to `wext_handle_ioctl'
net/socket.c:3420: undefined reference to `compat_wext_handle_ioctl'
net/core/net-procfs.c:329: undefined reference to `wext_proc_init'
net/core/net-procfs.c:345: undefined reference to `wext_proc_exit'
minimized to 50 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_MBIM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_PURELIFI WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_SILABS WLAN_VENDOR_ZYDAS X86_X32_ABI ZEROPLUS_FF]
disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed
testing current HEAD 95805f9e46c7fea597709005eb36d952be24a1a3
testing commit 95805f9e46c7fea597709005eb36d952be24a1a3 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4bd5d332407799e205bd650c1f67f99e2b77bc07e84175cc66e14630d36da187
run #0: crashed: invalid opcode in ext4_writepages
run #1: crashed: KASAN: use-after-free Read in ext4_find_extent
run #2: crashed: KASAN: slab-out-of-bounds Read in ext4_find_extent
run #3: crashed: KASAN: use-after-free Read in ext4_find_extent
run #4: crashed: invalid opcode in ext4_writepages
run #5: crashed: invalid opcode in ext4_writepages
run #6: crashed: KASAN: use-after-free Read in ext4_find_extent
run #7: crashed: KASAN: use-after-free Read in ext4_find_extent
run #8: crashed: KASAN: use-after-free Read in ext4_find_extent
run #9: crashed: KASAN: use-after-free Read in ext4_find_extent
representative crash: KASAN: use-after-free Read in ext4_find_extent, types: [KASAN UNKNOWN]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 44m46.42247405s (build: 19m51.622111181s, test: 22m15.074152741s)
crash still not fixed or there were kernel test errors
commit msg: ANDROID: GKI: add GKI symbol list for Exynosauto SoC
crash: KASAN: use-after-free Read in ext4_find_extent
==================================================================
BUG: KASAN: use-after-free in ext4_ext_binsearch fs/ext4/extents.c:837 [inline]
BUG: KASAN: use-after-free in ext4_find_extent+0xb60/0xd10 fs/ext4/extents.c:953
Read of size 4 at addr ffff88812514ffb4 by task kworker/u4:3/357
CPU: 1 PID: 357 Comm: kworker/u4:3 Not tainted 6.1.68-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x105/0x148 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:316 [inline]
print_report+0x158/0x4e0 mm/kasan/report.c:427
kasan_report+0x13c/0x170 mm/kasan/report.c:531
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350
ext4_ext_binsearch fs/ext4/extents.c:837 [inline]
ext4_find_extent+0xb60/0xd10 fs/ext4/extents.c:953
ext4_ext_map_blocks+0x25d/0x64d0 fs/ext4/extents.c:4103
ext4_map_blocks+0x821/0x1890 fs/ext4/inode.c:651
mpage_map_one_extent fs/ext4/inode.c:2423 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2476 [inline]
ext4_writepages+0x13f4/0x3120 fs/ext4/inode.c:2844
do_writepages+0x338/0x5b0 mm/page-writeback.c:2472
__writeback_single_inode+0x73/0x7a0 fs/fs-writeback.c:1612
writeback_sb_inodes+0x881/0x1500 fs/fs-writeback.c:1903
wb_writeback+0x357/0x810 fs/fs-writeback.c:2077
wb_do_writeback fs/fs-writeback.c:2220 [inline]
wb_workfn+0x37d/0xdf0 fs/fs-writeback.c:2260
process_one_work+0x6de/0xd00 kernel/workqueue.c:2299
worker_thread+0x892/0xf20 kernel/workqueue.c:2446
kthread+0x215/0x270 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
The buggy address belongs to the physical page:
page:ffffea00049453c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x12514f
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea0004946148 ffffea0004943108 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x141cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_WRITE), pid 477, tgid 476 (syz-executor.0), ts 46369811738, free_ts 46369897571
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook mm/page_alloc.c:2566 [inline]
prep_new_page+0x512/0x5e0 mm/page_alloc.c:2573
get_page_from_freelist+0x288b/0x2910 mm/page_alloc.c:4397
__alloc_pages+0x39f/0x780 mm/page_alloc.c:5684
__folio_alloc+0x15/0x40 mm/page_alloc.c:5716
__folio_alloc_node include/linux/gfp.h:245 [inline]
folio_alloc include/linux/gfp.h:274 [inline]
filemap_alloc_folio include/linux/pagemap.h:474 [inline]
__filemap_get_folio+0x53b/0x6a0 mm/filemap.c:1983
pagecache_get_page+0x15/0xb0 mm/folio-compat.c:110
grab_cache_page_write_begin+0x3d/0x60 mm/folio-compat.c:122
ext4_write_begin+0x201/0xe00 fs/ext4/inode.c:1197
ext4_da_write_begin+0x397/0x6f0 fs/ext4/inode.c:2989
generic_perform_write+0x2ee/0x520 mm/filemap.c:3829
ext4_buffered_write_iter+0x2d8/0x540 fs/ext4/file.c:285
ext4_file_write_iter+0x195/0x1200
call_write_iter include/linux/fs.h:2258 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0xa13/0xd40 fs/read_write.c:584
ksys_write+0x15c/0x240 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x76/0x80 fs/read_write.c:646
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1474 [inline]
free_pcp_prepare mm/page_alloc.c:1548 [inline]
free_unref_page_prepare+0x794/0x7a0 mm/page_alloc.c:3470
free_unref_page+0xb2/0x5b0 mm/page_alloc.c:3566
__folio_put_small mm/swap.c:105 [inline]
__folio_put+0x7c/0xa0 mm/swap.c:128
folio_put include/linux/mm.h:1417 [inline]
put_page include/linux/mm.h:1469 [inline]
ext4_write_begin+0xc53/0xe00 fs/ext4/inode.c:1279
ext4_da_write_begin+0x397/0x6f0 fs/ext4/inode.c:2989
generic_perform_write+0x2ee/0x520 mm/filemap.c:3829
ext4_buffered_write_iter+0x2d8/0x540 fs/ext4/file.c:285
ext4_file_write_iter+0x195/0x1200
call_write_iter include/linux/fs.h:2258 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0xa13/0xd40 fs/read_write.c:584
ksys_write+0x15c/0x240 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x76/0x80 fs/read_write.c:646
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffff88812514fe80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff88812514ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88812514ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff888125150000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff888125150080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 357 Comm: kworker/u4:3 Tainted: G B 6.1.68-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:mpage_map_one_extent fs/ext4/inode.c:2435 [inline]
RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2476 [inline]
RIP: 0010:ext4_writepages+0x310e/0x3120 fs/ext4/inode.c:2844
Code: e9 45 89 f0 e8 23 cd 06 00 65 ff 0d 44 cf 30 7e 49 bf 00 00 00 00 00 fc ff df 0f 85 7e fb ff ff e8 ef c6 2e ff e9 74 fb ff ff <0f> 0b 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5
RSP: 0018:ffffc90000d87060 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 000000000000042b RCX: 1ffff920001b0e6a
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffffc90000d87450 R08: dffffc0000000000 R09: ffffed10200b574c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881101af670
R13: ffffc90000d87320 R14: ffff8881005aba98 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 000000010f02b000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_writepages+0x338/0x5b0 mm/page-writeback.c:2472
__writeback_single_inode+0x73/0x7a0 fs/fs-writeback.c:1612
writeback_sb_inodes+0x881/0x1500 fs/fs-writeback.c:1903
wb_writeback+0x357/0x810 fs/fs-writeback.c:2077
wb_do_writeback fs/fs-writeback.c:2220 [inline]
wb_workfn+0x37d/0xdf0 fs/fs-writeback.c:2260
process_one_work+0x6de/0xd00 kernel/workqueue.c:2299
worker_thread+0x892/0xf20 kernel/workqueue.c:2446
kthread+0x215/0x270 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:mpage_map_one_extent fs/ext4/inode.c:2435 [inline]
RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2476 [inline]
RIP: 0010:ext4_writepages+0x310e/0x3120 fs/ext4/inode.c:2844
Code: e9 45 89 f0 e8 23 cd 06 00 65 ff 0d 44 cf 30 7e 49 bf 00 00 00 00 00 fc ff df 0f 85 7e fb ff ff e8 ef c6 2e ff e9 74 fb ff ff <0f> 0b 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5
RSP: 0018:ffffc90000d87060 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 000000000000042b RCX: 1ffff920001b0e6a
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffffc90000d87450 R08: dffffc0000000000 R09: ffffed10200b574c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881101af670
R13: ffffc90000d87320 R14: ffff8881005aba98 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 000000010f02b000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400